31 And he brought forth the people that were therein, and put them under saws, and under harrows of iron, and under axes of iron, and made them pass through the brick-kiln: and thus did he unto all the cities of the children of Ammon. So David and all the people returned unto Jerusalem.
2 Samuel 12:31 Cross References - KJV
2 Samuel 8:2
2 And he smote Moab, and measured them with a line, casting them down to the ground; even with two lines measured he to put to death, and with one full line to keep alive. And so the Moabites became David's servants, and brought gifts.
1 Chronicles 20:3
3 And he brought out the people that were in it, and cut them with saws, and with harrows of iron, and with axes. Even so dealt David with all the cities of the children of Ammon. And David and all the people returned to Jerusalem.
Psalms 21:8-9
Amos 1:3
3 Thus saith the LORD; For three transgressions of Damascus, and for four, I will not turn away the punishment thereof; because they have threshed Gilead with threshing instruments of iron: